CVE-2026-18721 kalcaddle kodbox SSO API Login apiLogin redirect
An attacker can exploit an open redirect in the SSO API login to redirect users to malicious sites, potentially facilitating phishing attacks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-18721?
CVE-2026-18721 is a medium-severity vulnerability in kalcaddle kodbox, published on 4 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A vulnerability has been found in kalcaddle kodbox 1.67 Build 02. This issue affects some unknown processing of the file /user/sso/apiLogin of the component SSO API Login. The manipulation of the argument callbackUrl leads to open redirect. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Weakness: CWE-601
Which versions are affected by CVE-2026-18721?
How do I fix CVE-2026-18721?
No fix has been published for CVE-2026-18721 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-18721 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-18721 exists.
Sources
Also known as GHSA-f83r-6hq8-m7vj.